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Differences What are the advantages of each

Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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Much higher clock speed 2.26 GHz vs 1.8 GHz More than 25% higher clock speed
Significantly higher turbo clock speed 2.8 GHz vs 2.3 GHz More than 20% higher turbo clock speed
Lower typical power consumption 48.75W vs 56.88W Around 15% lower typical power consumption
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Lower annual commercial energy cost 52.56 $/year vs 61.32 $/year Around 15% lower annual commercial energy cost
Lower annual home energy cost 14.45 $/year vs 16.86 $/year Around 15% lower annual home energy cost
Front view of Intel Xeon E5-2650L

Reasons to consider the
Intel Xeon E5-2650L

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Much more l3 cache 20 MB vs 12 MB More than 65% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 16 vs 12 4 more threads
Supports more RAM 393,216 MB vs 294,912 MB Supports around 35% more RAM
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Newer Mar, 2012 vs Mar, 2010 Release date over 2 years later

Benchmarks Real world tests of Xeon L5640 vs E5-2650L

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5640
16,852

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5640
1,250,000 MB/s
Xeon E5-2650L
1,030,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon L5640
11,047
Xeon E5-2650L
16,330

GeekBench

Xeon L5640
11,047
Xeon E5-2650L
16,330

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon L5640  vs
E5-2650L 
Clock speed 2.26 GHz 1.8 GHz
Turbo clock speed 2.8 GHz 2.3 GHz
Cores Hexa core Octa core
Socket type
LGA 1366
LGA 2011

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 70W
Annual home energy cost 14.45 $/year 16.86 $/year
Annual commercial energy cost 52.56 $/year 61.32 $/year
Performance per watt 10.46 pt/W 7.09 pt/W
Typical power consumption 48.75W 56.88W

bus

Architecture QPI QPI
Number of links 2 2
Data rate 46,928 MB/s 64,000 MB/s
Transfer rate 5,860 MT/s 8,000 MT/s
Clock speed 2,930 MHz 4,000 MHz

details

Xeon L5640  vs
E5-2650L 
Architecture x86-64 x86-64
Threads 12 16
L2 cache 2 MB 2 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 20 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Clock multiplier 17 23
Voltage range 0.75 - 1.35V 0.6 - 1.35V
Operating temperature Unknown - 69.4°C Unknown - 72°C

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 51,200 MB/s
Maximum memory size 294,912 MB 393,216 MB
Intel Xeon L5640
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Intel Xeon E5-2650L
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